Question 12
Determine all values that the expression
$$
\frac{1 + \cos^2 x}{\sin^2 x} + \frac{1 + \sin^2 x}{\cos^2 x},
$$
can attain, where $x$ is a real number.
$$
\frac{1 + \cos^2 x}{\sin^2 x} + \frac{1 + \sin^2 x}{\cos^2 x},
$$
can attain, where $x$ is a real number.